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一、工程概况渝涪二线YDK46+100~YDK46+320段位于四川盆地东缘平行岭谷区,该段路堑位于既有线右侧,与既有线之间的线间距为25m,最大挖深约13m。扩堑石方以砂岩为主,且裂隙发育,地下水丰富。爆区左侧为既有线浆砌片石挡墙,因当地雨水丰富且挡墙使用时间较长,造成挡墙老化、轻微开裂、损
I. Project Overview The YDK46 +100 ~ YDK46 + 320 sections of the second line of Yufu are located in the parallel Linggou section of the eastern margin of the Sichuan Basin. The section of the cut is located on the right side of the existing line with a line spacing of 25m from the existing line and a maximum excavation depth of about 13m . Decadent stones are dominated by sandstone, with developed fissures and rich groundwater. The left side of the blasting area is the existing wire-bonded masonry retaining wall, which is rich in rain and retaining wall for a long time, resulting in retaining wall aging, slight cracking and damage